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ProFi-Accurate The ProFi-Accurate dosing valve is a compact system designed for the gentle and precise dosing of solid products. A uniform and clog-free product flow is thus ensured. Thanks to its compact construction, the stand-alone ProFi-Accurate dosing valve is easily integrated in Frewitt units or in the customers’ existing process plants. The valve is actuated by a servomotor, which effectively prevents the formation of product bridges in the vibration or oscillation mode.